
/*
 * Janino - An embedded Java[TM] compiler
 *
 * Copyright (c) 2001-2010, Arno Unkrig
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
 *       following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *       following disclaimer in the documentation and/or other materials provided with the distribution.
 *    3. The name of the author may not be used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package util;

import java.util.ArrayList;
import java.util.List;

import org.codehaus.commons.compiler.CompilerFactoryFactory;
import org.codehaus.commons.compiler.ICompilerFactory;
import org.junit.runners.Parameterized.Parameters;

/** Utility methods for testing. */
public final
class TestUtil {

    /**
     * Use this method as follows:
     * <pre>
     *     &#64;Parameters(name = "CompilerFactory={0}")
     *     public static Collection&lt;Object[]>
     *     <i>any-name</i>() throws Exception {
     *         return TestUtil.getCompilerFactoriesForParameters();
     *     }
     * </pre>
     *
     * @return The available compiler factories in a format suitable for JUnit {@link Parameters}
     */
    public static List<Object[]>
    getCompilerFactoriesForParameters() throws Exception {
        ArrayList<Object[]> f = new ArrayList<Object[]>();
        for (ICompilerFactory fact : CompilerFactoryFactory.getAllCompilerFactories()) {
            f.add(new Object[] { fact });
        }
        if (f.isEmpty()) {
            throw new RuntimeException("Could not find any Compiler Factories on the classpath");
        }
        return f;
    }

    private TestUtil() {}
}
